| Porter-gaud School | 1.9 |
Regular elementary or secondary | KG-12 | 917 | 7.8 | Episcopal |
| James Island Christian School | 2.8 |
Regular elementary or secondary | Pre-KG-12 | 210 | 9.6 | Christian (no specific denomination) |
| First Baptist Church School | 4.0 |
Regular elementary or secondary | Pre-KG-12 | 218 | 4.6 | Baptist |
| Trident Academy | 5.9 |
Special education | KG-12 | 88 | 2.7 | Nonsectarian |
| Ferndale Baptist School | 8.6 |
Regular elementary or secondary | Pre-KG-12 | 98 | 8.6 | Baptist |
| Charleston Collegiate School | 9.0 |
Regular elementary or secondary | Pre-KG-12 | 250 | 7.5 | Nonsectarian |
| Capers Preparatory Christian Academy | 10.3 |
Regular elementary or secondary | KG-11 | 44 | 6.3 | Christian (no specific denomination) |
| Riverbend Christian Academy | 11.5 |
Regular elementary or secondary | Pre-KG-12 | 95 | 11.9 | Baptist |
| Northside Christian School | 13.9 |
Regular elementary or secondary | Pre-KG-12 | 368 | 10.7 | Baptist |
| Cathedral Academy | 14.0 |
Regular elementary or secondary | KG-12 | 302 | 16.3 | Christian (no specific denomination) |
| Northwood Academy | 14.8 |
Regular elementary or secondary | Pre-KG-12 | 803 | 34.0 | Christian (no specific denomination) |
| Northwood Academy | 14.9 |
Regular elementary or secondary | KG-12 | 819 | 12.5 | Other |
| Northwood Academy | 14.9 |
Regular elementary or secondary | KG-12 | 815 | 12.5 | Christian (no specific denomination) |
| St Pauls Academy | 17.2 |
Regular elementary or secondary | Pre-KG-12 | 84 | 8.4 | Nonsectarian |
| Grace Christian Academy | 18.3 |
Regular elementary or secondary | KG-12 | 142 | 12.9 | Pentecostal |
| Eagle Military Academy | 18.6 |
Alternative/other | 3-12 | 84 | 15.0 | Christian (no specific denomination) |
| Palmetto Pines Rtc - Charlestown | 18.8 |
Alternative/other | 6-12 | 49 | 12.2 | Nonsectarian |
| The Remnant Christian School | 18.9 |
Regular elementary or secondary | 6-12 | 14 | 14.0 | Christian (no specific denomination) |
| Faith Christian School And Daycare | 20.5 |
Regular elementary or secondary | Pre-KG-12 | 271 | 12.4 | Assembly of God |
| Ridge Christian Academy | 21.3 |
Regular elementary or secondary | Pre-KG-12 | 124 | 8.6 | Baptist |
